b73e214c3d
could copy all bytes so we could get undesired results if things don't fit. git-svn-id: https://svn.code.sf.net/p/gphoto/code/trunk/libgphoto2@3974 67ed7778-7388-44ab-90cf-0a291f65f57c
248 lines
6.7 KiB
C
248 lines
6.7 KiB
C
/* range.c
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*
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* Copyright (C) 2002 Lutz Müller <lutz@users.sourceforge.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <config.h>
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#include "range.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "main.h"
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#ifdef ENABLE_NLS
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# include <libintl.h>
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# undef _
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# define _(String) dgettext (PACKAGE, String)
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# ifdef gettext_noop
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# define N_(String) gettext_noop (String)
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# else
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# define N_(String) (String)
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# endif
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#else
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# define textdomain(String) (String)
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# define gettext(String) (String)
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# define dgettext(Domain,Message) (Message)
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# define dcgettext(Domain,Message,Type) (Message)
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# define bindtextdomain(Domain,Directory) (Domain)
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# define _(String) (String)
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# define N_(String) (String)
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#endif
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/*
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str_grab_nat() - Grab positive decimal integer (natural number) from str
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starting with pos byte. On return pos points to the first byte after
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grabbed integer.
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*/
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static int
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str_grab_nat(const char *str, int *pos)
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{
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int result, old_pos = *pos;
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char *buf;
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if (!(buf = (char*)strdup(str))) /* we can not modify str */
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return -1;
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*pos += strspn(&buf[*pos], "0123456789");
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buf[*pos] = 0;
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result = atoi(&buf[old_pos]);
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free(buf);
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return result;
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}
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/*
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parse_range() - Intentionally, parse list of images given in range. Syntax
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of range is:
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( m | m-n ) { , ( m | m-n ) }
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where m,n are decimal integers with 1 <= m <= n <= MAX_IMAGE_NUMBER.
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Ranges are XOR (exclusive or), so that
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1-5,3,7
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is equivalent to
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1,2,4,5,7
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Conversion from 1-based to 0-based numbering is performed, that is,
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n-th image corresponds to (n-1)-th byte in index. The value of
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index[n] is either 0 or 1. 0 means not selected, 1 selected.
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index passed to parse_range() must be an array of MAX_IMAGE_NUMBER
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char-s set to 0 (use memset() or bzero()).
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*/
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static int
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parse_range_rec (const char *range, unsigned int start, char *index,
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GPContext *context)
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{
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int i = 0, l = -1, r = -1, j;
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char buf[1024];
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do {
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strncpy (buf, range, sizeof (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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strncat (buf, "\n", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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switch (range[start + i]) {
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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for (j = 0; j < start + i; j++) {
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strncat (buf, " ", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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}
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l = str_grab_nat (range + start, &i);
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for (; j < start + i; j++) {
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strncat (buf, "^", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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}
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if (l <= 0) {
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gp_context_error (context, _("%s\n"
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"Image IDs must be a number greater "
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"than zero."), buf);
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return (GP_ERROR_BAD_PARAMETERS);
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}
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if (l > MAX_IMAGE_NUMBER) {
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gp_context_error (context, _("%s\n"
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"Image ID %i too high."), buf, l);
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return (GP_ERROR_BAD_PARAMETERS);
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}
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break;
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case '-' :
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/* If we already have r, then something is wrong. */
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if (r > 0) {
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for (j = 0; j < start + i; j++) {
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strncat (buf, " ", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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}
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strncat (buf, "^", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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gp_context_error (context, _("%s\n"
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"Ranges must be separated by ','."),
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buf);
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return (GP_ERROR_BAD_PARAMETERS);
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}
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/* If we have not l, then something is wrong, too. */
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if (l <= 0) {
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for (j = 0; j < start + i; j++) {
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strncat (buf, " ", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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}
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strncat (buf, "^", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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gp_context_error (context, _("%s\n"
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"Ranges need to start with "
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"a number."), buf);
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return (GP_ERROR_BAD_PARAMETERS);
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}
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i++;
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for (j = 0; j < start + i; j++) {
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strncat (buf, " ", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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}
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r = str_grab_nat (range + start, &i);
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for (; j < start + i; j++) {
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strncat (buf, "^", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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}
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buf[sizeof (buf) - 1] = 0;
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if (r <= 0) {
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gp_context_error (context, _("%s\n"
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"Image IDs must be a number greater "
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"than zero."), buf);
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return (GP_ERROR_BAD_PARAMETERS);
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}
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if (r > MAX_IMAGE_NUMBER) {
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gp_context_error (context, _("%s\n"
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"Image ID %i too high."), buf, r);
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return (GP_ERROR_BAD_PARAMETERS);
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}
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break;
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case '\0' :
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break;
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default :
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for (j = 0; j < start + i; j++) {
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strncat (buf, " ", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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}
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strncat (buf, "^", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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gp_context_error (context, _("%s\n"
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"Unexpected "
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"character '%c'."), buf, range[start + i]);
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return (GP_ERROR_BAD_PARAMETERS);
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}
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} while ((range[start + i] != '\0') &&
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(range[start + i] != ','));
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if (i) {
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if (0 < r) { /* update range of bytes */
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if (r < l) {
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strncpy (buf, range, sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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strncat (buf, "\n", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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for (j = 0; j < start; j++) {
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strncat (buf, " ", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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}
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for (; j < start + i; j++) {
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strncat (buf, "^", sizeof (buf) - strlen (buf) - 1);
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buf[sizeof (buf) - 1] = 0;
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}
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gp_context_error (context, _("%s\n"
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"Decreasing ranges "
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"are not allowed. You specified a "
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"range from %i to %i."), buf, l, r);
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return (GP_ERROR_BAD_PARAMETERS);
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}
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for (j = l; j <= r; j++)
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index[j - 1] ^= 1; /* convert to 0-based numbering */
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} else /* update single byte */
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index[l - 1] ^= 1; /* convert to 0-based numbering */
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}
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/*
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* If there is another range, parse it.
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*/
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if (range[start + i] == ',')
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return parse_range_rec (range, start + i + 1, index, context);
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return (GP_OK);
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}
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int
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parse_range (const char *range, char *index, GPContext *context)
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{
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return (parse_range_rec (range, 0, index, context));
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}
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